Motor belt



Nav. 2o, 1923. 4 1,474,666

R. D. EDWARDS MOTOR BELTl Fivled sept. 2, 19221 [NVENTOR ATTORNEY Patented Nov. 20, 1923.

NITED S TAT'E S "PiCIIE'NTI GFFICE..

f 'MOTORBEL IApplication filed September-2, 1922. Serial No. 585,392.

` 1o allya/)hom #may concern Be. it `known that. I, ROBERT I). -FinwARDa a citizen of the United States, residing at Kansas' City, in the-county of Jackson and State of Missouri, have invented certain new and useful 'Improven-ients'in Motor Belts; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompany ing drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to motor belts and particularly to fan belts for transmittingpower from an explosion motor to a fan designed to distribute air over the motor.

The primary object of the invention is to provide a novel form of belt constructed from a single piece of fabric such as canvas, or duck, the canvas being initially cut in a strip, the ends of which are fastened together to form an endless band. The belt is folded over upon itself laterally in a plurality of plies preferably of progressively decreasing widths from the periphery toward the center, the folds being fastened together by lines of stitching so that a complete belt 3 is provided.

The novel construction of the belt will be apparent by reference to the following description in connection with the accompanying drawings, in which- Fig. l is a perspective view of a single, relatively wide strip having its ends fastened together to provide the band.

Fig. 2 is a perspective view showing the next step in forming the belt.

Fig. 8 is a perspective view showing the third step in forming the belt.

Fig. 4 is a perspective view showing the fourth step in forming the belt.

Fig. 5 is a perspective view of the belt i folded to provide the fifth step.

Fig. 6 is a perspective view of the belt structure folded to provide the sixth step.

Fig. 7 is a perspective view of the com pleted belt, and

Fig. 8 is an enlarged, cross sectional view through the completed belt.

In carrying out the invention I first provide a relatively wide strip 1 and cut the ends at acute an les so that the ends 'can be fas- H tened togeter by a bias seam 2.

After the band is thus formed, shown in Fig. l, it is folded laterally with the folded edge 3 midway its longitudinal center, the free edges land 5 being fastened together by a line of stitching 6. Then the -free edges which have `iust been stitched are turned over to form a relatively narrow hem 7, as shown in Fig. 3. The folded over edge portion 3 is then folded over on the main portion of the belt in a lateral direction to make a fold 8, the initially folded over edge 3 lying adjacent to the edge of the hem 7. 'I he folded-over lap 9 formed by making the fold 8 is then folded back toward one edge of the band to make a fold at the point designated 10 in Fig. 5 so that there is a folded portion with six plies and a hem portion with four plies, there being a space ll between them.

The hein portion is then folded over on the band so that its outer edge 12 will lie against the inner edge of the fold l0, as indicated in Fig. 6. Then the belt is folded at the point 13. so that the hem is on the outside of the belt, and stitched; the belt then being turned inside out, as shown in Fig. 'Z'. Fig. 7 indicates the complete belt consisting of a plurality of back and forth folds or plies of progressively decreasing widths from the periphery to the inner face of the belt, the hem being folded in between certain of the folds, as indicated at 14 (Fig.

The strip is first connect-ed together, of course, ay a line of stitching and tbe hem shown in Fig. 2 is formed by a line of stitching. The two edges are then fastened to- `gether by a line of stitching 15; the hem is held in place by another line of stitching 16, the folded-over portion shown in Fig. 4: is again stitched to the belt by a line of stitching 17, and then when the lapped-over portion is folded back upon itself. it is secured by a further line of stitching 18. Then the hemmedover portion is folded over, as shown 1n Fig. 6, secured to the body portion of the belt by a line of stitching 19 and finally, when the folds are caused to assume the position shown in Fig. 7 and before the belt is turned, an additional line of stitching 20 fastens them all together.

Such a built-up belt made from a single strip of fabric folded back and forth laterally upon itself will provide a belt of considerable strength and great endurance, the belt being substantially V-shaped in cross section so that it can he readily received in the grooved pulley ou the fau Shaft and u grooved pulley on the motor Shaft.

ln actuel practice l have dcnionstruted that Such a belt besides having endurance and Wearing qualities will have no appreciable stretch after :L considerable period 0f use.

Other fabrics thun canvas er duel; may be employed if desired, hut l recoreinend canes or duck as the material best Suited for the purpose.

`Whet l claim und desire to Secure by Letters-Patent is:

As a new article of manufacture., inotor belt, consisting of a single Strip of flexible material `occured :it its ends to provide :i bund, the hand being folded long its longitudinal center to provide two plies, the free edges of the two plies being turned over to provide e narrow hein, the first folded edge being turned over to Contact with the hein, the fold thus mede being,` reversibly folded, the hein portion being folded leech upon the remainder of the hand, the heinined portion being reversihly folded upon the first mentioned portion, and the plies being stitched one upon the other as e result of the Several folds.

En testimony whereof I my Signature.

ROBERT D. EDVARDS. 

